ETSI EN 300 188-3
- Integrated Services Digital Network (ISDN); Three-Party (3PTY) supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 3: Test Suite Structure and Test Purposes (TSS&TP) specification for the user
- standard by European Telecommunications Standards Institute, 06/01/1998
- Publisher: ETSI
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